# Author:xiaoma
# date：2021/12/30
def reserch4letters(py_word):
    py_vowels = ["a", "e", "i", "o", "u"]
    py_found = {}
    for i in py_word:
        if i in py_vowels:
            # 初始化 setdefault
            py_found.setdefault(i, 0)
            py_found[i] += 1
    return py_found